Mercurial > hg > easyhg
view src/panner.cpp @ 425:ad106f5fe75f
Add "Ignore Files" and "Edit Ignored List" to Work menu (latter is subsumed from Advanced menu formerly). Also subsume Serve via HTTP into File menu as Share Repository, and add a more helpful description of it. Remove Advanced menu
author | Chris Cannam |
---|---|
date | Thu, 23 Jun 2011 10:58:32 +0100 |
parents | 496f2042155a |
children | 533519ebc0cb |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* EasyMercurial Based on HgExplorer by Jari Korhonen Copyright (c) 2010 Jari Korhonen Copyright (c) 2011 Chris Cannam Copyright (c) 2011 Queen Mary, University of London This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ #include "panner.h" #include "panned.h" #include "debug.h" #include <QPolygon> #include <QMouseEvent> #include <QColor> #include <iostream> class PannerScene : public QGraphicsScene { public: friend class Panner; }; Panner::Panner() : m_clicked(false), m_moved(false) { setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff); setOptimizationFlags(QGraphicsView::DontSavePainterState | QGraphicsView::IndirectPainting); setMouseTracking(true); setInteractive(false); } void Panner::fit(QRectF r) { Qt::AspectRatioMode m = Qt::IgnoreAspectRatio; if (height() > width()) { // Our panner is vertical; if the source is not tall, // don't stretch it to fit in the height, it'd look weird if (r.height() < height() * 2) { m = Qt::KeepAspectRatio; } } else { // Similarly, but horizontal if (r.width() < width() * 2) { m = Qt::KeepAspectRatio; } } DEBUG << "Panner: fit mode " << m << endl; fitInView(r, m); } void Panner::setScene(QGraphicsScene *s) { if (scene()) { disconnect(scene(), SIGNAL(changed(const QList<QRectF> &)), this, SLOT(slotSceneChanged(const QList<QRectF> &))); disconnect(scene(), SIGNAL(sceneRectChanged(const QRectF &)), this, SLOT(slotSceneRectChanged(const QRectF &))); } QGraphicsView::setScene(s); m_cache = QPixmap(); if (scene()) { QRectF r = sceneRect(); DEBUG << "scene rect: " << r << ", my rect " << rect() << endl; fit(r); connect(scene(), SIGNAL(changed(const QList<QRectF> &)), this, SLOT(slotSceneChanged(const QList<QRectF> &))); connect(scene(), SIGNAL(sceneRectChanged(const QRectF &)), this, SLOT(slotSceneRectChanged(const QRectF &))); } } void Panner::connectToPanned(Panned *p) { connect(p, SIGNAL(pannedRectChanged(QRectF)), this, SLOT(slotSetPannedRect(QRectF))); connect(this, SIGNAL(pannedRectChanged(QRectF)), p, SLOT(slotSetPannedRect(QRectF))); connect(this, SIGNAL(zoomIn()), p, SLOT(zoomIn())); connect(this, SIGNAL(zoomOut()), p, SLOT(zoomOut())); } void Panner::slotSetPannedRect(QRectF rect) { m_pannedRect = rect; viewport()->update(); } void Panner::resizeEvent(QResizeEvent *) { DEBUG << "Panner::resizeEvent" << endl; if (scene()) fit(sceneRect()); m_cache = QPixmap(); } void Panner::slotSceneRectChanged(const QRectF &newRect) { DEBUG << "Panner::slotSceneRectChanged" << endl; if (!scene()) return; // spurious fit(newRect); m_cache = QPixmap(); viewport()->update(); } void Panner::slotSceneChanged(const QList<QRectF> &) { DEBUG << "Panner::slotSceneChanged" << endl; if (!scene()) return; // spurious m_cache = QPixmap(); viewport()->update(); } void Panner::paintEvent(QPaintEvent *e) { QPaintEvent *e2 = new QPaintEvent(e->region().boundingRect()); QGraphicsView::paintEvent(e2); QPainter paint; paint.begin(viewport()); paint.setClipRegion(e->region()); QPainterPath path; path.addRect(rect()); path.addPolygon(mapFromScene(m_pannedRect)); QColor c(QColor::fromHsv(211, 194, 238)); c.setAlpha(80); paint.setPen(Qt::NoPen); paint.setBrush(c); paint.drawPath(path); paint.setBrush(Qt::NoBrush); paint.setPen(QPen(QColor::fromHsv(211, 194, 238), 0)); paint.drawConvexPolygon(mapFromScene(m_pannedRect)); paint.end(); emit pannerChanged(m_pannedRect); } void Panner::updateScene(const QList<QRectF> &rects) { DEBUG << "Panner::updateScene" << endl; // if (!m_cache.isNull()) m_cache = QPixmap(); QGraphicsView::updateScene(rects); } void Panner::drawItems(QPainter *painter, int numItems, QGraphicsItem *items[], const QStyleOptionGraphicsItem options[]) { if (m_cache.size() != viewport()->size()) { DEBUG << "Panner: cache size " << m_cache.size() << " != viewport size " << viewport()->size() << ": recreating cache" << endl; QGraphicsScene *s = scene(); if (!s) return; PannerScene *ps = static_cast<PannerScene *>(s); m_cache = QPixmap(viewport()->size()); m_cache.fill(Qt::transparent); QPainter cachePainter; cachePainter.begin(&m_cache); cachePainter.setTransform(viewportTransform()); ps->drawItems(&cachePainter, numItems, items, options); cachePainter.end(); DEBUG << "done" << endl; } painter->save(); painter->setTransform(QTransform()); painter->drawPixmap(0, 0, m_cache); painter->restore(); } void Panner::mousePressEvent(QMouseEvent *e) { if (e->button() != Qt::LeftButton) { QGraphicsView::mouseDoubleClickEvent(e); return; } m_clicked = true; m_moved = false; m_clickedRect = m_pannedRect; m_clickedPoint = e->pos(); } void Panner::mouseDoubleClickEvent(QMouseEvent *e) { if (e->button() != Qt::LeftButton) { QGraphicsView::mouseDoubleClickEvent(e); return; } moveTo(e->pos()); } void Panner::mouseMoveEvent(QMouseEvent *e) { if (!m_clicked) return; QPointF cp = mapToScene(m_clickedPoint); QPointF mp = mapToScene(e->pos()); QPointF delta = mp - cp; if (!m_moved) { if ((m_clickedPoint - e->pos()).manhattanLength() > 2) { m_moved = true; } else { return; } } QRectF nr = m_clickedRect; nr.translate(delta); m_pannedRect = nr; emit pannedRectChanged(m_pannedRect); viewport()->update(); } void Panner::mouseReleaseEvent(QMouseEvent *e) { if (e->button() != Qt::LeftButton) { QGraphicsView::mouseDoubleClickEvent(e); return; } if (m_clicked) { if (m_moved) { mouseMoveEvent(e); } else { moveTo(e->pos()); } } m_clicked = false; viewport()->update(); } void Panner::wheelEvent(QWheelEvent *e) { int d = e->delta(); if (d > 0) { while (d > 0) { emit zoomOut(); d -= 120; } } else { while (d < 0) { emit zoomIn(); d += 120; } } } void Panner::moveTo(QPoint p) { QPointF sp = mapToScene(p); QRectF nr = m_pannedRect; double dx = sp.x() - nr.center().x(); double dy = sp.y() - nr.center().y(); nr.translate(dx, dy); slotSetPannedRect(nr); emit pannedRectChanged(m_pannedRect); viewport()->update(); }